Radio Galaxy Zoo Talk

ARG0003f4o: lobe appears split by foreground galaxy?

  • JeanTate by JeanTate

    The radio emission is #double, with host zsp 0.446 SDSS J233645.19+054428.4:

    enter image description here

    However, the N lobe seems to be split in two:

    enter image description here

    The split seems to coincide with the foreground galaxy zph 0.175±0.017 SDSS J233645.69+054500.6:

    enter image description here

    Maybe there's some kind of diffraction/refraction of the radio, caused by passing through the ISM/plasma in that foreground galaxy?

    Posted

  • Dolorous_Edd by Dolorous_Edd

    Note that it is also green

    Posted

  • JeanTate by JeanTate

    Here's an contour overlay image:

    enter image description here

    I did a BOTE (Back Of The Envelope) calculation of the size of the Einstein ring radius, assuming 737 cosmology and the foreground galaxy having a mass of 10^12 sols (~the same as our own galaxy) ... and was somewhat surprised that it's ~3" 😮 Maybe it's worth someone checking my arithmetic?

    The contour overlay image in this post was created from sources, and using methods, described in this RGZ Talk thread. You get a gravitational lensing Einstein ring if the lens is symmetric, and the source, lens, and observer are perfectly aligned.

    Posted

  • JeanTate by JeanTate

    ARG0002h8n may be similar, though the edge-on spiral may not be in the foreground.

    Posted

  • JeanTate by JeanTate

    ARG0001c1v contains a good example.

    Posted